public void BitBangSpiModeTest()
{
Console.WriteLine("Starting bit bang SPI mode test...");
byte[] MISO;
uint mode;
List <byte> MOSI = new List <byte>();
for (int i = 0; i < 1024; i++)
{
MOSI.Add((byte)(i & 0x7F));
}
FX3.BitBangSpiConfig = new BitBangSpiConfig(true);
FX3.BitBangSpiConfig.SCLK = (FX3PinObject)FX3.DIO3;
FX3.ReadPin(FX3.DIO3);
FX3.ReadPin(FX3.DIO3);
Random rnd = new Random();
for (int trial = 0; trial < 64; trial++)
{
mode = (uint)(rnd.NextDouble() * 4);
Console.WriteLine("Testing bit-bang SPI mode " + mode.ToString());
FX3.BitBangSpiConfig.CPHA = ((mode & 0x1) != 0);
FX3.BitBangSpiConfig.CPOL = ((mode & 0x2) != 0);
for (uint len = 8; len < 64; len += 8)
{
MISO = FX3.BitBangSpi(len, 1, MOSI.ToArray(), 1000);
Assert.AreEqual(len >> 3, MISO.Count(), "ERROR: Invalid data count");
for (int i = 0; i < MISO.Count(); i++)
{
Assert.AreEqual(MOSI[i], MISO[i], "ERROR: Invalid echo data");
}
}
/* Check SCLK pin level after transfer */
if (FX3.BitBangSpiConfig.CPOL)
{
Assert.AreEqual(1, FX3.ReadPin(FX3.DIO4), "ERROR: Expected SCLK to be idle high");
}
else
{
Assert.AreEqual(0, FX3.ReadPin(FX3.DIO4), "ERROR: Expected SCLK to be idle low");
}
}
}
public void BitBangSpiTest()
{
Console.WriteLine("Starting bit bang SPI functionality test...");
byte[] MISO;
List <byte> MOSI = new List <byte>();
for (int i = 0; i < 1024; i++)
{
MOSI.Add((byte)(i & 0x7F));
}
Console.WriteLine("Testing bit bang SPI word length...");
for (uint wordLen = 8; wordLen <= 512; wordLen += 8)
{
Console.WriteLine("Testing bit length of " + wordLen.ToString());
/* Override SPI pins */
FX3.BitBangSpiConfig = new BitBangSpiConfig(true);
MISO = FX3.BitBangSpi(wordLen, 1, MOSI.ToArray(), 1000);
Assert.AreEqual(Math.Ceiling(wordLen / 8.0), MISO.Count(), "ERROR: Invalid data count");
for (int i = 0; i < MISO.Count(); i++)
{
Assert.AreEqual(MOSI[i], MISO[i], "ERROR: Invalid echo data");
}
/* Override DIO3/4 pins */
FX3.BitBangSpiConfig.MOSI = (FX3PinObject)FX3.DIO3;
FX3.BitBangSpiConfig.MISO = (FX3PinObject)FX3.DIO4;
MISO = FX3.BitBangSpi(wordLen, 1, MOSI.ToArray(), 1000);
Assert.AreEqual(Math.Ceiling(wordLen / 8.0), MISO.Count(), "ERROR: Invalid data count");
for (int i = 0; i < MISO.Count(); i++)
{
Assert.AreEqual(MOSI[i], MISO[i], "ERROR: Invalid echo data");
}
}
Console.WriteLine("Testing restore hardware SPI functionality...");
FX3.RestoreHardwareSpi();
TestSpiFunctionality();
}